The following is from the Ohio Educator Code of Conduct:
7. Accepting Compensation for Self Promotion or Personal Gain
Educators shall ensure that school property, public funds or fees paid by students or the community are not used for personal gain. Educators shall not make decisions based upon gifts, gratuities, favors or the socioeconomic status of parents, family members, community members or businesses.
An educator is entrusted with public funds and school property in the course of performing job duties and maintains a high level of honesty, accuracy and accountability to ensure that institutional privileges are not used for personal gain. An educator maintains integrity with students, colleagues, parents, families, community or businesses when accepting gifts, gratuities or favors. To avoid bias or prejudice, an educator needs to ensure that decisions made about students or school policy are not negatively influenced by the socioeconomic status of parents, family members, community members or businesses.
Conduct unbecoming includes, but is not limited to, the following actions:
a) Soliciting students or parents of students to purchase equipment, supplies, or services or to participate in activities that financially benefit the educator without notifying the superintendent or designee and/or not in accordance with local board policy.
d) Coaching and/or promoting athletic or artistic camps, offseason leagues, etc. in one’s district for profit without notifying the superintendent or designee and/or not in accordance with local board policy.
If the coach is a teacher, they may be violating the code of conduct and/or school policy. Most schools have a policy against accepting money from someone you teach or coach. The school policy would also apply if you were a coach but not a teacher. I am not sure if the educator code of conduct applies to someone who is not a teacher. It may, because you have to get a Pupil Validation Certificate to coach at a school in Ohio. That is issued by the Ohio Department of Education.